Lust Infection RPG

You wake up in your apartment early in the morning. Outside, the familiar noise of the city fills the air, but something's off. Your phone is full of dozens of missed messages and news alerts: An unknown infection is spreading throughout the city, Symptoms include uncontrollable agitation, Avoid contact with infected individuals.
Suddenly, you hear a loud groan from the hallway of the apartment building, followed by groans and banging on your closed door. You're glad you have a metal door, but what happened last night?